128 Proceedings of the Royal Society of Victoria. 



First AntenticE. — The first or upper antennfe are short, scarcely 

 reaching to the end of the peduncle of the second antennpe, and 

 are divided into sometimes nine and sometimes ten joints. The 

 first three form the peduncle, and show a slight difference to the 

 succeeding ones; the basal Joint is stouter and somewhat longer 

 than the succeeding ones, and the upper margin is slightly con- 

 cave ; it is free from set?e. The second and third are subequal in 

 length, but the second is somewhat stouter than the third ; they 

 are each studded with fine stiff outstanding setae, and near 

 the distal margin of each are a few very long tine setee point- 

 ing distally. The succeeding joints, composing the Jlagel/um are 

 mostly with the exception of the penultimate and distal ones, sub- 

 equal, and slightly shorter than the last joint of the peduncle, as 

 well as being somewhat thinner. Near the distal margin of each 

 is a series of a few short setje pointing distally, and very 

 occasionally, from any part of a joint, may arise a single "olfac- 

 tory" and plumose seta, pointing directly outwards. The penul- 

 timate joint is about twice the length of any of the preceding 

 ones, and has a number of setaj near the upper margin. The 

 terminal joint is very short and bluntly pointed, and arising from 

 its summit are tufts of setae. The setae are of three distinct 

 kinds, viz., {a) so called " olfactory cylinders," {b) delicately 

 plumose or feathered sette, and {c) long setae, which, under high 

 magnification, show the extremity to be cleft into three minute 

 pieces, one of which is slightly swollen and rounded, and having 

 a fine filament leaving it on one side ; the other two pieces are 

 pointed, and arched over the rounded piece. At a short distance 

 from the end, there is the appearance of a transverse line. This 

 latter form is situated on the distal margin of each joint. At the 

 end of the last joint, the three kinds are found together. 



Second Anten?icE. — The second antennse are about two-thirds 

 the length of the body. The pedi/nde consists of five joints. The 

 first two are short and subequal, the third as long as the previous 

 two combined, and slightly curved, the fourth somewhat longer, 

 being as long as the first three combined. Each of the joints is 

 sparsely setose, while from the terminal margin of the fifth is a 

 series of very long setae and also a few from the under margins 

 of the third and fourth. Tlie flagellum is composed of about 

 twenty-eight joints ; the first is twice as long as each of the 



